Question

Solve the following system of equations: (1 point)

−2x + y = 1


−4x + y = −1

Answer 1

This is a homework review problem, right? <3

Answer 2

x=1,y=3

Answer 3

You need to explain.

Answer 4

oh.....
-2x+y=1
-4x+y=-1
y=1+2x
-4x+1+2x=-1
-2x=-1
x=1

Answer 5

You need to isolate the x and isolate the y to one side so you can solve. You can always set the problem equal to zero and plug numbers in to check them

Answer 6

and next we put x on one of equations
-2+y=1
y=3

Answer 7

It is easier to subtract equation 2 from equation 1.
−2x + y = 1
−4x + y = −1
4x - y = 1 sometimes it is easier to multiple equation 2 by - 1 and add
in either case the y is eliminated
2x + 0 = 2

solve for x and plug it back in and solve for y